Leviticus 14:48-50

New International Version - UK

⁴⁸ ‘But if the priest comes to examine it and the mould has not spread after the house has been plastered, he shall pronounce the house clean, because the defiling mould is gone. ⁴⁹ To purify the house he is to take two birds and some cedar wood, scarlet yarn and hyssop. ⁵⁰ He shall kill one of the birds over fresh water in a clay pot.